11222211121220 has 96 divisors (see below), whose sum is σ = 25740419798016. Its totient is φ = 4075830460800.

The previous prime is 11222211121151. The next prime is 11222211121271. The reversal of 11222211121220 is 2212111222211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11222211121192 and 11222211121201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 655379579 + ... + 655396701.

It is an arithmetic number, because the mean of its divisors is an integer number (268129372896).

Almost surely, 2^{11222211121220} is an apocalyptic number.

11222211121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222211121220 is an abundant number, since it is smaller than the sum of its proper divisors (14518208676796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11222211121220 is a wasteful number, since it uses less digits than its factorization.

11222211121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20601 (or 20599 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11222211121220 its reverse (2212111222211), we get a palindrome (13434322343431).

The spelling of 11222211121220 in words is "eleven trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".